Am I making a mistake getting Find 7?

Good news/bad news. The good? The game ran flawlessly on my G3 without any force close, though it's not my cup of tea. Bad? You may have some other issue with your phone. Possibly something you've installed is interacting with the game(s)? Are you using ART, it's still beta and can have issues with some apps? I didn't have any issues running it, but switched back to Dalvik after rooting because xposed doesn't play with ART. There are differences in our G3's , I have 3gb/32gb and we have different radio frequencies but that shouldn't make a difference here. In my experience, custom roms/kernels add function, speed and battery life but more often than not at the cost of stability. Waiting for a custom rom to fix your stability issue might not be the best strategy. Good luck squashing your bug!!!

On line reviews have shown that frame rate can be affected slightly with some games, but I've yet to use an app or game where this was noticeable in real world use and most of those same on line reviews have stated the same. Every game I've played has run fine and looked good...every one! QHD may have an impact, but "underpowered" is a bit of a stretch.

I was a bit "over the top" with "underpowered". I would say the 801 is at its upper limits in rendering all the pixels. The screen is also using a lot of power and creating more heat which is causing throttling which in turn is causing performance issues(see Samsung's new QHD display tech which uses less power). The 2/16gb model which we have in the UK is pretty horrible to use, a lot of redraws,lag and stutter.

im using D855(10j) playing brave frontier with all effect on and it getting force close almost everytime..

This is true. If you crank the graphics in BF it does indeed crash out. A lot. Nexus 7 does it too though not quite as much as it's lower res than we are but higher than 1080 on the same platform so it struggles with the maxed effects/drops.

XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality.Are you a developer?